Course Introduction

The mainframe is the industry term used for a large computer, which supports thousands of users across the globe. IBM mainframe computer has been called as the dinosaur of the technology world. It is widely used by large industrial houses, Financial institutes, insurance companies, railways, automobile industry etc.

Mainframe Concepts

  • Architecture
  •  Input/Output Devices

JOB STATEMENT

  • CLASS
  •  PRTY
  •  MSGCLASS
  •  MSGLEVEL
  •  TYPRUN

JOBLIB/STEPLIB

  • JOBLIB
  •  STEPLIB

EXEC STATEMENT

COMMON PARAMETER IN BOTH JOB AND EXEC STATEMENTS

DD STATEMENT

SPECIAL DD STATEMENTS

  • DUMMY
  • Concatenating Data sets
  •  Passing data to COBOL program using – SYSIN DD *
  •  SYSOUT
  •  SYSUDUMP
  •  SYSADUMP

ALTERNATE INDEXES

VSAM IN COBOL PROGRAM

Introduction to COBOL

Data Structures and Storage

  • Declaring Variables
  •  Using Data Structures
  •  Formatting Output
  •  77 and 88 Levels
  •  Declaring and Using Arrays
  •  Loan Schedule Report

File I/O

  • File/Record Descriptions
  •  Physical/Logical File Descriptions
  •  Reading Records from a File
  •  Sequentially Writing Records
  •  Indexed File I/O
  •  Printing Reports

INSTREAM and CATALOGED PROCEDURES

  • Introduction
  •  Instream Procedure
  •  Cataloged procedure
  •  Modify statements in a procedure
  •  Symbolic parameters

Generation Data Groups (GDG)

  • INTRODUCTION
  •  CREATION OF GDG
  •  USING GDG
  •  ALTERING GDG DEFINITION
  •  DELETING GDG

Control Job Processing (IF THEN ELSE) in JCL

Restarting and checkpoint in JCL

INTRODUCTION TO VSAM

  • Virtual Storage
  •  Virtual Storage Access Method
  •  Advantages and Disadvantages of VSAM
  •  Logical Record
  •  Physical Record
  •  Control Interval
  •  Control Interval Splits
  •  Spanned Records

VSAM TYPES

ACCESS METHOD SERVICES

COBOL Techniques

VSAM IN COBOL PROGRAM

  • Using VSAM with COBOL
  •  START Statement
  •  WRITE
  •  REWRITE
  •  CLOSE
  •  FILE STATUS

 

 

 

 

 

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